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SteamWriter Help
Hello guys, recently while making a program my SteamWriter has been giving me trouble. Anyway my program has a function where it saves what is in listboxs and then imports the text when the form loads back into the listboxes. It also has a save button, everything works fine except for one thing; if I clear the listboxses the SteamWriter doesn't want to clear the textfiles with it and imports what was in the listbox before I cleared it, however it will keep on adding text fine. Any help C# community? This is the code for the SteamWriter and SteamReader:

SteamWriter:
Code:
 {
                var dir = @"C:\NormenJaydenFBI's Key Manager";
                if (!Directory.Exists(dir))
                {
                    Directory.CreateDirectory(dir);
                }
                using (StreamWriter writer = new StreamWriter("C:\\NormenJaydenFBI's Key Manager\\Clean.txt", true))
                {
                    {
                        string listbox1Text = "";
                        foreach (string li in listBox1.Items)
                        {
                            listbox1Text = listbox1Text + li + Environment.NewLine;
                        }
                        listbox1Text = listbox1Text + Environment.NewLine;
                        writer.Write(listbox1Text);
                    }
                }
                using (StreamWriter writer = new StreamWriter("C:\\NormenJaydenFBI's Key Manager\\All.txt", true))
                {
                    string listbox1Text = "";
                    foreach (string li in listBox5.Items)
                    {
                        listbox1Text = listbox1Text + li + Environment.NewLine;
                    }
                    listbox1Text = listbox1Text + Environment.NewLine;
                    writer.Write(listbox1Text);
                }
                using (StreamWriter writer = new StreamWriter("C:\\NormenJaydenFBI's Key Manager\\In-Use.txt", true))
                {
                    string listbox1Text = "";
                    foreach (string li in listBox2.Items)
                    {
                        listbox1Text = listbox1Text + li + Environment.NewLine;
                    }
                    listbox1Text = listbox1Text + Environment.NewLine;
                    writer.Write(listbox1Text);
                }
                using (StreamWriter writer = new StreamWriter("C:\\NormenJaydenFBI's Key Manager\\Sold.txt", true))
                {
                    string listbox1Text = "";
                    foreach (string li in listBox3.Items)
                    {
                        listbox1Text = listbox1Text + li + Environment.NewLine;
                    }
                    listbox1Text = listbox1Text + Environment.NewLine;
                    writer.Write(listbox1Text);
                }
                using (StreamWriter writer = new StreamWriter("C:\\NormenJaydenFBI's Key Manager\\Hacked On.txt", true))
                {
                    string listbox1Text = "";
                    foreach (string li in listBox4.Items)
                    {
                        listbox1Text = listbox1Text + li + Environment.NewLine;
                    }
                    listbox1Text = listbox1Text + Environment.NewLine;
                    writer.Write(listbox1Text);
                }
            }
        }
Steam Reader:
Code:
StreamReader stRead = new StreamReader("C:\\NormenJaydenFBI's Key Manager\\Clean.txt", true);
            {
                while (!stRead.EndOfStream)
                {
                    listBox1.Items.Add(stRead.ReadLine());
                }
            }
            stRead.Close();
            StreamReader stRead2 = new StreamReader("C:\\NormenJaydenFBI's Key Manager\\In-Use.txt", true);
            {
                while (!stRead2.EndOfStream)
                {
                    listBox2.Items.Add(stRead2.ReadLine());
                }
            }
            stRead2.Close();
            StreamReader stRead3 = new StreamReader("C:\\NormenJaydenFBI's Key Manager\\Sold.txt", true);
            {
                while (!stRead3.EndOfStream)
                {
                    listBox3.Items.Add(stRead3.ReadLine());
                }
            }
            stRead3.Close();
            StreamReader stRead4 = new StreamReader("C:\\NormenJaydenFBI's Key Manager\\Hacked On.txt", true);
            {
                while (!stRead4.EndOfStream)
                {
                    listBox4.Items.Add(stRead4.ReadLine());
                }
            }
            stRead4.Close();
            StreamReader stRead5 = new StreamReader("C:\\NormenJaydenFBI's Key Manager\\All.txt", true);
            {
                while (!stRead5.EndOfStream)
                {
                    listBox5.Items.Add(stRead5.ReadLine());
                }
            }
            stRead5.Close();
#1 ·
Code:
using(StreamWriter sr = new StreamWriter( ... ))
{
    if(listBox1.Items.Count > 0)
    {
             foreach(Object o in  listBox1.Items)
      {
            sr.WriteLine(o.ToString());
      }
      sr.Flush();
    }
}
Not sure if this's what you wanted tho
#2 ·
Why not just delete the txt file when clearing the listbox.
#4 ·
Quote Originally Posted by Pingo View Post
Why not just delete the txt file when clearing the listbox.
I fixed it now, but it wants to import blank lines into the listBox.
#5 ·
If you are reading your textfiles, you could something like that:

Code:
string fileLine = "";
StreamReader youStreamReader = new StreamReader("YourTextFile.txt", true);
{
     while ((fileLine = yourStreamReader.ReadLine()) != null)
     {
           if(fileLine != "")
           {
                 listBox.Items.Add(fileLine);
           }
     }
}

youStreamReader.Close();
youStreamReader.Dispose();
This will check if the line is empty or not.
If its empty then it wont add the file to your ListBox.

Hopefully i understand you right and that will help you a bit.

P.s.: Why you dont use the StreamWriter.WriteLine method on your stream writers?
I think its better and you dont need to add the new line thing manually
#6 · edited ·
Sure, np.
Does your reading and writing stuff working now?
#8 ·
Quote Originally Posted by Devil589 View Post
Sure, np.
Does your reading and writing stuff working now?
Yes it does, perfectly.
Also another question about a different program. I have the program trying to give permissions full control to a group that has denied access; the coding doesn't seem to work as it crashes giving me the error registry access is not allowed, though I edited the manifest and ran the program as administrator.
#9 ·
Simplier version that doesn't require messing around with streams (by the way, it's best to wrap them in a using statement if you ever user them).

This method requires .NET 3.5 and above:
Code:
listBox1.Items.AddRange(File.ReadAllLines("blah.txt").Select(s => (object)s).ToArray());
Otherwise for .NET 2.0 and 3.0:
Code:
foreach(string line in File.ReadAllLines("blah.txt"))
{
    if(!string.IsNullOrEmpty(line))
        listBox1.Items.Add(line);
}
Also, writing them (requires .NET 3.5 and above since we're using LINQ):
Code:
File.WriteAllLines("blah.txt", listBox1.Items.Cast<object>().Select(o => o.ToString()));
Otherwise if you're using .NET 2.0 or 3.0:
Code:
var lines = new List<string>();
foreach(object o in listBox1.Items)
    lines.Add(o.ToString());
File.WriteAllLines("blah.txt", lines.ToArray());
Remember to add the System.Linq namespace if you use the LINQ methods.
#10 · edited ·
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